aboutsummaryrefslogtreecommitdiff
path: root/packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch
diff options
context:
space:
mode:
Diffstat (limited to 'packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch')
-rw-r--r--packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch340
1 files changed, 0 insertions, 340 deletions
diff --git a/packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch b/packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch
deleted file mode 100644
index 3c11e3d9..00000000
--- a/packages/binutils/2.25.1/0017-xtensa-optimize-trampolines-relaxation.patch
+++ /dev/null
@@ -1,340 +0,0 @@
-From cbe53e134d4c3a656880a906738ce19fdcd38e8b Mon Sep 17 00:00:00 2001
-From: Max Filippov <jcmvbkbc@gmail.com>
-Date: Fri, 1 May 2015 11:39:12 +0300
-Subject: [PATCH] xtensa: optimize trampolines relaxation
-
-Currently every fixup in the current segment is checked when relaxing
-trampoline frag. This is very expensive. Make a searchable array of
-fixups pointing at potentially oversized jumps at the beginning of every
-relaxation pass and only check subset of this cache in the reach of
-single jump from the trampoline frag currently being relaxed.
-
-Original profile:
-
-% time self children called name
------------------------------------------
- 370.16 593.38 12283048/12283048 relax_segment
- 98.4 370.16 593.38 12283048 xtensa_relax_frag
- 58.91 269.26 2691463834/2699602236 xtensa_insnbuf_from_chars
- 68.35 68.17 811266668/813338977 S_GET_VALUE
- 36.85 29.51 2684369246/2685538060 xtensa_opcode_decode
- 28.34 8.84 2684369246/2685538060 xtensa_format_get_slot
- 12.39 5.94 2691463834/2699775044 xtensa_format_decode
- 0.03 4.60 4101109/4101109 relax_frag_for_align
- 0.18 1.76 994617/994617 relax_frag_immed
- 0.07 0.09 24556277/24851220 new_logical_line
- 0.06 0.00 12283048/14067410 as_where
- 0.04 0.00 7094588/15460506 xtensa_format_num_slots
- 0.00 0.00 1/712477 xtensa_insnbuf_alloc
------------------------------------------
-
-Same data, after optimization:
-
-% time self children called name
------------------------------------------
- 0.51 7.47 12283048/12283048 relax_segment
- 58.0 0.51 7.47 12283048 xtensa_relax_frag
- 0.02 4.08 4101109/4101109 relax_frag_for_align
- 0.18 1.39 994617/994617 relax_frag_immed
- 0.01 0.98 555/555 xtensa_cache_relaxable_fixups
- 0.21 0.25 7094588/16693271 xtensa_insnbuf_from_chars
- 0.06 0.12 24556277/24851220 new_logical_line
- 0.06 0.00 7094588/15460506 xtensa_format_num_slots
- 0.02 0.04 7094588/16866079 xtensa_format_decode
- 0.05 0.00 12283048/14067410 as_where
- 0.00 0.00 1/712477 xtensa_insnbuf_alloc
- 0.00 0.00 93808/93808 xtensa_find_first_cached_fixup
------------------------------------------
-
-2015-05-02 Max Filippov <jcmvbkbc@gmail.com>
-gas/
- * config/tc-xtensa.c (cached_fixupS, fixup_cacheS): New typedefs.
- (struct cached_fixup, struct fixup_cache): New structures.
- (fixup_order, xtensa_make_cached_fixup),
- (xtensa_realloc_fixup_cache, xtensa_cache_relaxable_fixups),
- (xtensa_find_first_cached_fixup, xtensa_delete_cached_fixup),
- (xtensa_add_cached_fixup): New functions.
- (xtensa_relax_frag): Cache fixups pointing at potentially
- oversized jumps at the beginning of every relaxation pass. Only
- check subset of this cache in the reach of single jump from the
- trampoline frag currently being relaxed.
-
-Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
----
-Backported from: b76f99d702c3501ac320396ea06bc7f9237173c3
-Changes to ChangeLog are dropped.
-
- gas/config/tc-xtensa.c | 220 ++++++++++++++++++++++++++++++++++++++++++-------
- 1 file changed, 193 insertions(+), 27 deletions(-)
-
---- a/gas/config/tc-xtensa.c
-+++ b/gas/config/tc-xtensa.c
-@@ -8785,6 +8785,154 @@
- static long relax_frag_immed
- (segT, fragS *, long, int, xtensa_format, int, int *, bfd_boolean);
-
-+typedef struct cached_fixup cached_fixupS;
-+struct cached_fixup
-+{
-+ int addr;
-+ int target;
-+ int delta;
-+ fixS *fixP;
-+};
-+
-+typedef struct fixup_cache fixup_cacheS;
-+struct fixup_cache
-+{
-+ cached_fixupS *fixups;
-+ unsigned n_fixups;
-+ unsigned n_max;
-+
-+ segT seg;
-+ fragS *first_frag;
-+};
-+
-+static int fixup_order (const void *a, const void *b)
-+{
-+ const cached_fixupS *pa = a;
-+ const cached_fixupS *pb = b;
-+
-+ if (pa->addr == pb->addr)
-+ {
-+ if (pa->target == pb->target)
-+ {
-+ if (pa->fixP->fx_r_type == pb->fixP->fx_r_type)
-+ return 0;
-+ return pa->fixP->fx_r_type < pb->fixP->fx_r_type ? -1 : 1;
-+ }
-+ return pa->target - pb->target;
-+ }
-+ return pa->addr - pb->addr;
-+}
-+
-+static bfd_boolean xtensa_make_cached_fixup (cached_fixupS *o, fixS *fixP)
-+{
-+ xtensa_isa isa = xtensa_default_isa;
-+ int addr = fixP->fx_frag->fr_address;
-+ int target;
-+ int delta;
-+ symbolS *s = fixP->fx_addsy;
-+ int slot;
-+ xtensa_format fmt;
-+ xtensa_opcode opcode;
-+
-+ if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP ||
-+ fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP)
-+ return FALSE;
-+ target = S_GET_VALUE (s);
-+ delta = target - addr;
-+
-+ if (abs(delta) < J_RANGE / 2)
-+ return FALSE;
-+
-+ xtensa_insnbuf_from_chars (isa, trampoline_buf,
-+ (unsigned char *) fixP->fx_frag->fr_literal +
-+ fixP->fx_where, 0);
-+ fmt = xtensa_format_decode (isa, trampoline_buf);
-+ gas_assert (fmt != XTENSA_UNDEFINED);
-+ slot = fixP->tc_fix_data.slot;
-+ xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf);
-+ opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf);
-+ if (opcode != xtensa_j_opcode)
-+ return FALSE;
-+
-+ o->addr = addr;
-+ o->target = target;
-+ o->delta = delta;
-+ o->fixP = fixP;
-+
-+ return TRUE;
-+}
-+
-+static void xtensa_realloc_fixup_cache (fixup_cacheS *cache, unsigned add)
-+{
-+ if (cache->n_fixups + add > cache->n_max)
-+ {
-+ cache->n_max = (cache->n_fixups + add) * 2;
-+ cache->fixups = xrealloc (cache->fixups,
-+ sizeof (*cache->fixups) * cache->n_max);
-+ }
-+}
-+
-+static void xtensa_cache_relaxable_fixups (fixup_cacheS *cache,
-+ segment_info_type *seginfo)
-+{
-+ fixS *fixP;
-+
-+ cache->n_fixups = 0;
-+
-+ for (fixP = seginfo->fix_root; fixP ; fixP = fixP->fx_next)
-+ {
-+ xtensa_realloc_fixup_cache (cache, 1);
-+
-+ if (xtensa_make_cached_fixup (cache->fixups + cache->n_fixups, fixP))
-+ ++cache->n_fixups;
-+ }
-+ qsort (cache->fixups, cache->n_fixups, sizeof (*cache->fixups), fixup_order);
-+}
-+
-+static unsigned xtensa_find_first_cached_fixup (const fixup_cacheS *cache,
-+ int addr)
-+{
-+ unsigned a = 0;
-+ unsigned b = cache->n_fixups;
-+
-+ while (b - a > 1)
-+ {
-+ unsigned c = (a + b) / 2;
-+
-+ if (cache->fixups[c].addr < addr)
-+ a = c;
-+ else
-+ b = c;
-+ }
-+ return a;
-+}
-+
-+static void xtensa_delete_cached_fixup (fixup_cacheS *cache, unsigned i)
-+{
-+ memmove (cache->fixups + i, cache->fixups + i + 1,
-+ (cache->n_fixups - i - 1) * sizeof (*cache->fixups));
-+ --cache->n_fixups;
-+}
-+
-+static bfd_boolean xtensa_add_cached_fixup (fixup_cacheS *cache, fixS *fixP)
-+{
-+ cached_fixupS o;
-+ unsigned i;
-+
-+ if (!xtensa_make_cached_fixup (&o, fixP))
-+ return FALSE;
-+ xtensa_realloc_fixup_cache (cache, 1);
-+ i = xtensa_find_first_cached_fixup (cache, o.addr);
-+ if (i < cache->n_fixups)
-+ {
-+ ++i;
-+ memmove (cache->fixups + i + 1, cache->fixups + i,
-+ (cache->n_fixups - i) * sizeof (*cache->fixups));
-+ }
-+ cache->fixups[i] = o;
-+ ++cache->n_fixups;
-+ return TRUE;
-+}
-
- /* Return the number of bytes added to this fragment, given that the
- input has been stretched already by "stretch". */
-@@ -8896,35 +9044,42 @@
- case RELAX_TRAMPOLINE:
- if (fragP->tc_frag_data.relax_seen)
- {
-- segment_info_type *seginfo = seg_info (now_seg);
-- fragS *fP; /* The out-of-range jump. */
-- fixS *fixP;
-+ static fixup_cacheS fixup_cache;
-+ segment_info_type *seginfo = seg_info (now_seg);
-+ int trampaddr = fragP->fr_address + fragP->fr_fix;
-+ int searchaddr = trampaddr < J_RANGE ? 0 : trampaddr - J_RANGE;
-+ unsigned i;
-+
-+ if (now_seg != fixup_cache.seg ||
-+ fragP == fixup_cache.first_frag ||
-+ fixup_cache.first_frag == NULL)
-+ {
-+ xtensa_cache_relaxable_fixups (&fixup_cache, seginfo);
-+ fixup_cache.seg = now_seg;
-+ fixup_cache.first_frag = fragP;
-+ }
-
- /* Scan for jumps that will not reach. */
-- for (fixP = seginfo->fix_root; fixP ; fixP = fixP->fx_next)
-+ for (i = xtensa_find_first_cached_fixup (&fixup_cache, searchaddr);
-+ i < fixup_cache.n_fixups; ++i)
-+
- {
-- symbolS *s = fixP->fx_addsy;
-- xtensa_opcode opcode;
-- int target;
-- int addr;
-- int delta;
--
-- if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP ||
-- fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP)
-- continue;
-- xtensa_insnbuf_from_chars (isa, trampoline_buf,
-- (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where,
-- 0);
-- fmt = xtensa_format_decode (isa, trampoline_buf);
-- gas_assert (fmt != XTENSA_UNDEFINED);
-- slot = fixP->tc_fix_data.slot;
-- xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf);
-- opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf);
-- if (opcode != xtensa_j_opcode)
-+ fixS *fixP = fixup_cache.fixups[i].fixP;
-+ int target = fixup_cache.fixups[i].target;
-+ int addr = fixup_cache.fixups[i].addr;
-+ int delta = fixup_cache.fixups[i].delta + stretch;
-+
-+ trampaddr = fragP->fr_address + fragP->fr_fix;
-+
-+ if (addr + J_RANGE < trampaddr)
-+ continue;
-+ if (addr > trampaddr + J_RANGE)
-+ break;
-+ if (abs (delta) < J_RANGE)
- continue;
-- target = S_GET_VALUE (s);
-- addr = fixP->fx_frag->fr_address;
-- delta = target - addr + stretch;
-+
-+ slot = fixP->tc_fix_data.slot;
-+
- if (delta > J_RANGE || delta < -1 * J_RANGE)
- { /* Found an out-of-range jump; scan the list of trampolines for the best match. */
- struct trampoline_seg *ts = find_trampoline_seg (now_seg);
-@@ -8978,14 +9133,13 @@
- }
- if (tf->fragP == fragP)
- {
-- int trampaddr = fragP->fr_address + fragP->fr_fix;
--
- if (abs (addr - trampaddr) < J_RANGE)
- { /* The trampoline is in range of original; fix it! */
- fixS *newfixP;
- int offset;
- TInsn insn;
- symbolS *lsym;
-+ fragS *fP; /* The out-of-range jump. */
-
- new_stretch += init_trampoline_frag (tf);
- offset = fragP->fr_fix; /* Where to assemble the j insn. */
-@@ -9009,10 +9163,20 @@
- newfixP->tc_fix_data.X_add_symbol = lsym;
- newfixP->tc_fix_data.X_add_number = offset;
- newfixP->tc_fix_data.slot = slot;
-+
-+ xtensa_delete_cached_fixup (&fixup_cache, i);
-+ xtensa_add_cached_fixup (&fixup_cache, newfixP);
-+
- /* Move the fix-up from the original j insn to this one. */
- fixP->fx_frag = fragP;
- fixP->fx_where = fragP->fr_fix - 3;
- fixP->tc_fix_data.slot = 0;
-+
-+ xtensa_add_cached_fixup (&fixup_cache, fixP);
-+
-+ /* re-do current fixup */
-+ --i;
-+
- /* Adjust the jump around this trampoline (if present). */
- if (tf->fixP != NULL)
- {
-@@ -9027,6 +9191,8 @@
- fragP->fr_subtype = 0;
- /* Remove from the trampoline_list. */
- prev->next = tf->next;
-+ if (fragP == fixup_cache.first_frag)
-+ fixup_cache.first_frag = NULL;
- break;
- }
- }
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-08 13:54:42 +0000